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arXiv 1509.06320astro-ph.IMastro-ph.HE
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关于μ子簇射大小和簇射极大深度的联合分析

On the Combined Analysis of Muon Shower Size and Depth of Shower Maximum

J. Vicha, P. Travnicek, D. Nosek

摘要:

超高能宇宙射线的质量组成可以从簇射极大深度和μ子簇射大小的分布来研究。在这里,我们详细研究了平均μ子簇射大小对簇射极大值深度的依赖关系。质子和铁核引起的空气簇射模拟强子相互作用的两个模型已经调整与大型强子对撞机的数据(运行I-II)。所产生的空气簇射相结合,以获得各种类型的质量组成的初级束。我们研究了平均μ子簇射大小对簇射最大深度的函数依赖关系的形状及其对组合物混合物的依赖关系。拟合这种依赖关系,我们可以得到初级分数和μ子重标度因子,其统计不确定性为百分之几。当考虑不同模型时,重建的初级分数之间的差异小于20%。两个模型之间的μ子簇射大小的差异被观察到约为6%。

英文摘要:

The mass composition of ultra-high energy cosmic rays can be studied from the distributions of the depth of shower maximum and/or the muon shower size. Here, we study the dependence of the mean muon shower size on the depth of shower maximum in detail. Air showers induced by protons and iron nuclei were simulated with two models of hadronic interactions already tuned with LHC data (run I-II). The generated air showers were combined to obtain various types of mass composition of the primary beam. We investigated the shape of the functional dependence of the mean muon shower size on the depth of shower maximum and its dependency on the composition mixture. Fitting this dependence we can derive the primary fractions and the muon rescaling factor with a statistical uncertainty at a level of few percent. The difference between the reconstructed primary fractions is below 20% when different models are considered. The difference in the muon shower size between the two models was observed to be around 6%.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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